## AQA GCSE Changes in energy, Specific Heat Capacity

**Specific heat capacity** is the amount of **energy** needed to raise the temperature of **1kg** of a substance by** 1°C**.

The **higher** the value for **specific heat capacity**, the **more energy** needed to raise the **temperature** of the substance.

**Practice Questions**

1. Aluminium has a specific heat capacity of 900J/kg°C. Calculate the amount of energy needed to raise the temperature of a 2.5kg aluminium block from 20°C to 65°C.

2. Gold has a specific heat capacity of 130J/kg°C. Calculate the amount of energy needed to raise to the temperature of a 10g gold ring from 20°C to 600°C.

3. 10kJ of energy is transferred 1.5kg of material Y to raise its temperature by 20°C. Calculate the value of the specific heat capacity of Y.

4. Material G has a specific heat capacity of 650J/kg°C. 25kJ of energy is supplied to material 900g of material G to raise its temperature from 20°C. Calculate the final temperature of material G.

Absorption and Emission of EM Radiation

JJ Thomson and Plum pudding model

Ernest Rutherford and the Nuclear Model

Niels Bohr changing the Nuclear Model

Discovering the Proton and Neutron

Measuring radiation from radioactivity

Radiation types and properties

Random nature of radioactive decay

Radioactive contamination or irradiation

Hazards of contamination and irradiation

Studies on the effects of radiation on humans

Different half lives of radioactive isotopes

Nuclear Fission Chain Reaction

Writing nuclear fission equations